They say that a knight on the rim is dim, but what happens when we have to choose between two squares in the corner of the board $2 A saying definitely needs to be written about this too in order to help our decision-making.
15. c3c4 It's important to avoid the exchange since the pair of bishops is precisely one of the reasons for White's advantage. 15... a5d2  16. e1d2 With the bishop pair and a powerful pawn center, there's no doubt about White's advantage, but perhaps it's not as big as it seems. In any case, Fedoseev is an almost unparalleled master at turning questionable positions into victories. 16... f8e8 Preparing the break on e5. 17. e4e5 A natural reply, advancing the center and preventing it from being broken with e6-e5. The computer is not a big fan of this move.